I started playing "hard-ball" cricket in 2009, prior to that I played tape-ball throughout my life.
So if you consider 2009 as my childhood then its Gray Nicolls Powerbow (amazing profile really!)
However, my actual childhood was spent playing tape-ball cricket and then there was this Wills King bat which we (me and my brother had). It was amazing but then I broke it after getting bowled thrice on three consecutive deliveries, that day still haunts me as it was lovely bat! I'm remorseful when I think of that day..